- pacsat-dev - mailman.amsat.org

Fwd: Pacsat PC104 layout
by Bill Reed 23 Aug '24

23 Aug '24

-------- Forwarded Message -------- Subject: Pacsat PC104 layout Date: Fri, 23 Aug 2024 10:11:10 -0500 From: Bill Reed <bill(a)brconnect.com> To: eric.n.skoog(a)gmail.com, Mike Moore <k4mvm.22(a)gmail.com> Eric, Mike, Until recently pacsat was an Ascent project. We were an R&D project with no need to precisely define any interface requirements. We made a "best guess" and placed a PC104 connector at one end of our cubesat sized card. Even the card dimensions were an estimate of what a future flight might require. This was our first attempt, completed late spring of 2024: Our direction has changed. We are no longer an Ascent project, we are now a part of fox-plus-B, and we are now moving to make pacsat "flight ready". We are addressing several design issues discovered from this prototype. We hope to correct those issues soon. Since our PC104 design was just a best guess, we will be modifying our layout to be compatible with our first mission as a payload on fox-plus-B. We need a detailed description of the required PC104 interface. The LTM IHU V1.2 date January 22, 2022 does not provide dimensions for placement of the connector and I think is incomplete in describing all the pins used in this connector and what any interface requirements might be. I know that our current pin placements conflict with the LTM ICD. How can I resolve this issue? Should I just wait for an ICD for Fox Plus? Who would be my LTM engineering contact if I have interface questions? I would hope to have layout issues resolved by the end of 2024. I would be happy to schedule a go-to-meeting session to discuss. Bill Reed Pacsat team lead 214 437 9555

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Windows driver
by Bill Reed 23 Aug '24

23 Aug '24

Here is the info on the windows ftdi driver I use for the launchpad. Bill

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Followup on tonight's (Aug 22) meeting
by Patrick Thomas 23 Aug '24

23 Aug '24

Hi all, First off, sorry I couldn't provide a better "customer experience" with solid answers on all the very on-point LTM questions tonight. I think it will definitely help to get an expert in to give a technical presentation and do some Q&A. I did want to clarify one thing which may've been causing some confusion. We have been using the term "PC-104 connector," and if you search around for this online you will likely find the formal spec <https://pc104.org/wp-content/uploads/2015/02/PC104_Spec_v2_6.pdf> (from pc104.org) for the actual PC-104 connector, an ISA-derived 64 + 40 = 104-pin interface which looks like this: The cubesat community seems to use the term "PC-104 connector" to refer to the CubeSat Kit Bus (CSKB) connector, which is 26x4 = 104 pins (two 2x26 headers next to each other), which looks like this (top of the diagram, from the AMSAT LTM Brochure): I think this may have been the origin of some of the "it won't fit" or "the pinout isn't close" comments. Let me know if I'm on the right track. I will be sure this is clear in the new LTM ICD. As to where the connector is positioned, that is what I thought the Cal Poly cubesat design spec may have defined when I mentioned that in the meeting, but it looks like it had origins in Pumpkin, Inc. instead and then was more broadly adopted. I am going to do some further digging for a formal physical spec that I can point to. Meanwhile it should be easily derived from our layout files. (Or if someone on the list can answer, please speak up.) Thanks, Patrick

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Re: pacsat dev mtg 8/22/2024
by Cameron Castillo 23 Aug '24

23 Aug '24

I will be a few minutes late, getting stuck at work. Thanks, Cameron > On Aug 22, 2024, at 07:17, Bill via pacsat-dev <pacsat-dev(a)amsat.org> wrote: > > pacsat dev mtg 8/22/2024 > Thu, Aug 22, 2024 7:00 PM - 9:00 PM (CDT) > > Please join my meeting from your computer, tablet or smartphone. > > https://meet.goto.com/177258237 > > You can also dial in using your phone. > (For supported devices, tap a one-touch number below to join instantly.) > > United States: +1 (872) 240-3212 > - One-touch: tel:+18722403212,,177258237# > > Access Code: 177-258-237 > > Join from a video-conferencing room or system. > Dial in or type: 67.217.95.2 or inroomlink.goto.com > Meeting ID: 177 258 237 > Or dial directly: 177258237(a)67.217.95.2 or 67.217.95.2##177258237 > > > Get the app now and be ready when your first meeting starts: https://meet.goto.com/install > > > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

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pacsat dev mtg 8/22/2024
by Bill 22 Aug '24

22 Aug '24

pacsat dev mtg 8/22/2024 Thu, Aug 22, 2024 7:00 PM - 9:00 PM (CDT) Please join my meeting from your computer, tablet or smartphone. https://meet.goto.com/177258237 You can also dial in using your phone. (For supported devices, tap a one-touch number below to join instantly.) United States: +1 (872) 240-3212 - One-touch: tel:+18722403212,,177258237# Access Code: 177-258-237 Join from a video-conferencing room or system. Dial in or type: 67.217.95.2 or inroomlink.goto.com Meeting ID: 177 258 237 Or dial directly: 177258237(a)67.217.95.2 or 67.217.95.2##177258237 Get the app now and be ready when your first meeting starts: https://meet.goto.com/install

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Christopher Scott's email
by Blumenthal, Alex 17 Aug '24

17 Aug '24

Hi Bill, Here is the email address for Christopher Scott, the new student joining our PACSAT efforts. christopher.m.scott(a)und.edu Sincerely, Alex

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Sorry for abrupt exit
by Jim McCullers 16 Aug '24

16 Aug '24

Sorry for the departure. Out of the dark, Windows decided to test the blue screen of death feature. Interesting project Ron. Want to know more about it. Jim McCullers WA4CWI

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Pacsat dev mtg 8/15/2024
by Bill 16 Aug '24

16 Aug '24

Pacsat dev mtg 8/15/2024 Thu, Aug 15, 2024 7:00 PM - 9:00 PM (CDT) Please join my meeting from your computer, tablet or smartphone. https://meet.goto.com/284322237 You can also dial in using your phone. (For supported devices, tap a one-touch number below to join instantly.) United States: +1 (224) 501-3412 - One-touch: tel:+12245013412,,284322237# Access Code: 284-322-237 Join from a video-conferencing room or system. Dial in or type: 67.217.95.2 or inroomlink.goto.com Meeting ID: 284 322 237 Or dial directly: 284322237(a)67.217.95.2 or 67.217.95.2##284322237 Get the app now and be ready when your first meeting starts: https://meet.goto.com/install

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console connection
by Bill Reed 15 Aug '24

15 Aug '24

WWZMDiB Mini USB to TTL Serial Converter Adapter, 3.3V/5.5V, FTDI Breakout Board for Arduino <https://www.amazon.com/gp/product/B0BJKCSZZW/ref=ppx_od_dt_b_asin_title_s00…>

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Launchpad introduction
by Bill 15 Aug '24

15 Aug '24

We will demo Launchpad operation and installation. Alex: pass this invite on to others Launchpad intro Wed, Aug 14, 2024 5:00 PM - 6:00 PM (CDT) Please join my meeting from your computer, tablet or smartphone. https://meet.goto.com/491666317 You can also dial in using your phone. (For supported devices, tap a one-touch number below to join instantly.) United States: +1 (646) 749-3122 - One-touch: tel:+16467493122,,491666317# Access Code: 491-666-317 Join from a video-conferencing room or system. Dial in or type: 67.217.95.2 or inroomlink.goto.com Meeting ID: 491 666 317 Or dial directly: 491666317(a)67.217.95.2 or 67.217.95.2##491666317 Get the app now and be ready when your first meeting starts: https://meet.goto.com/install

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